org.apache.druid.segment.serde.ComplexMetricExtractor Maven / Gradle / Ivy

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A module that is everything required to understands Druid Segments

There is a newer version: 31.0.0

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.druid.segment.serde;

import org.apache.druid.data.input.InputRow;
import org.apache.druid.guice.annotations.ExtensionPoint;
import org.apache.druid.query.aggregation.AggregatorFactory;

import javax.annotation.Nullable;

/**
 */
@ExtensionPoint
public interface ComplexMetricExtractor
{
  Class extractedClass();

  @Nullable
  T extractValue(InputRow inputRow, String metricName);

  @Nullable
  default T extractValue(InputRow inputRow, String metricName, AggregatorFactory agg)
  {
    return extractValue(inputRow, metricName);
  }
}